condition mean min max ZT0-3 1435.0 1435.0 1435.0 ZT4-7 1350.4 1350.4 1350.4 ZT8-11 1375.75 1375.75 1375.75 ZT12-15 1493.6 1493.6 1493.6 ZT16-19 1656.95 1656.95 1656.95 ZT20-23 1426.35 1426.35 1426.35